docker构建多CPU镜像 - Fri, Dec 20, 2019

docker构建多CPU镜像

1. 概述

docker镜像是分平台的,不同平台的镜像不同. 如果docker的linux/arm64镜像运行在linux/amd64上,会报错exec format error.

2. docker构建多CPU镜像基础

docker registry版本:v2.3+ docker 版本:1.10+

3. 开启image manifest编译功能

docker manifest的开启需要额外的配置,并且不能用于开发环境.

It should not be used in production environments.

配置docker的config.json文件

sudo vim .docker/config.json

添加"experimental": "enabled"

{
	"auths": {
		"https://index.docker.io/v1/": {
			"auth": "a2Fpc2F3aW5kOjE5ODkwODEwTU1A"
		}
	},
	"HttpHeaders": {
		"User-Agent": "Docker-Client/19.03.3 (linux)"
	},
	"experimental": "enabled"
}

4. 创建多层镜像

docker manifest create csedge/device-serial-go:1.1.0-dev csedge/device-serial-go:1.1.0-arm64-dev csedge/device-serial-go:1.1.0-amd64-dev

docker manifest annotate csedge/device-serial-go:1.1.0-dev csedge/device-serial-go:1.1.0-arm64-dev --os linux --arch arm64

docker manifest annotate csedge/device-serial-go:1.1.0-dev csedge/device-serial-go:1.1.0-amd64-dev --os linux --arch amd64

docker manifest push csedge/device-serial-go:1.1.0-dev

查看manifest文件

docker manifest inspect csedge/device-serial-go:1.1.0-dev

{
   "schemaVersion": 2,
   "mediaType": "application/vnd.docker.distribution.manifest.list.v2+json",
   "manifests": [
      {
         "mediaType": "application/vnd.docker.distribution.manifest.v2+json",
         "size": 735,
         "digest": "sha256:cdcdfce4612155dbec008ac701652ae4136892da1989d4eeb24a4fa12912b8eb",
         "platform": {
            "architecture": "amd64",
            "os": "linux"
         }
      },
      {
         "mediaType": "application/vnd.docker.distribution.manifest.v2+json",
         "size": 735,
         "digest": "sha256:68644d08038f7add8cffc5c39688f47a23ff3cde0a92fb2ab163881be1bfe02d",
         "platform": {
            "architecture": "arm64",
            "os": "linux"
         }
      }
   ]
}